Topic landing page

[jinhojang6]

Description:

[Provide a brief description of the changes in the pull request.]

Related Issue(s):

[Link to the related Issue(s), if any.]

Changes Included:

• Bugfix (a change that fixes an issue)
• New feature (a change that adds new functionality)
• Refactoring (a change that improves code quality and/or architecture)
• Other (explain below)

Implementation Details:

[Explain any new decisions made during the implementation of the changes.]

Testing:

[Describe how the changes have been tested.]

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules